Exactly. The “where you do it doesn’t matter” crowd doesn’t seem to distinguish between Post WWII/Cold War expertise, Colonial America scholarship, Russia from Catherine the Great to the Bolshevik revolution, and the Rise of China as a superpower.
Not every college has depth in more than three or four areas. The traditional survey courses which start with Greco/Roman and end at the dawn of the 20th century can be taught by faculty with varying skills, interests and scholarship. Once you get past that?